Continuity mistake: In the intro, JD comes running back into the shot after trying to change out of the same exact outfit Dr Cox is wearing. JD has the "Baby Gap" TShirt stuck & wrapped around his head turban style. The shot switches to over his shoulder and the shirt is now loose, like a towel wrapped around his head.
Continuity mistake: As JD is unwrapping the patients head while talking to the Janitor, he completely unwraps the gauze and there is 3-4 inches of hair showing. The shot changes and suddenly the head has gauze on it again and only about an inch of hair is visible above the bandage.
Continuity mistake: When JD is in the wheelchair talking to Dr Cox and he almost tells him he was a gymnast in high school, a female doctor in a white coat is walking in his direction behind him. One shot later she's gone, and a few shots after that she's back walking in the same direction. (00:02:55)